Extra skin at bottom of vagina opening. Is this normal?

I(22f) am a virgin who’s never fingered myself because of fear. I’ve been wanting to try intercourse with a fwb. The first time he tried to finger me I tensed up because I thought it would hurt and it did. It hurt when he tried to insert his finger. I think it was the outer part that hurts. Second time he tried and I relaxed a bit and i pushed through the pain and it feels better after he got through the outer part and start thrusting his finger into me.

He couldn’t put his penis inside me when he tried. He said my opening is too small and I’m probably still too tight. It hurts a lot when he tried to put it in mainly at the lower part of my vagina. It also hurts a bit when he was trying to fondle with my vagina.

I went home and observed my vagina with a mirror and i spread it and saw a extra piece of skin(?) or tissue at the bottom of my vagina and i couldn’t see the lower edge of my vagina opening (I hope this make sense) this piece of skin was painful when i tried to stretch it. Its like a triangular shape thin piece of skin. Is this normal?